Recent content by mathgeek

A stoppered test tube that has a volume of 12.0 mL has 1.20 mL of water at its bottom. The water has a temperature of 100ºC and is initially at a pressure of 1.00 atm. The test tube is held over a flame until the water has completely boiled away. Estimate the final pressure inside the test tube...

You are designing a lathe motor, part of which consists of a uniform cylinder whose mass is 60 kg and whose radius is 0.50 m that is mounted so that it turns without friction on its axis, which is fixed. The cylinder is driven by a belt that wraps around its perimeter and exerts a constant...

A firm wants to determine the amount of frictional torque in their current line of grindstones, so they can redesign them to be more energy efficient. To do this, they ask you to test the best-selling model, which is basically a diskshaped grindstone of mass 1.0 kg and radius 8.80 cm which...

the initial speed of a 2.35 kg box traveling up a plane inclined 37degrees to the horizontal is 4.31 m/s the coefficient of kinetic friction between the box and the plane is 0.30. a.) how far along the incline does the box travel before coming to a stop? b.) what is the speed when it has...

A Force Fx acts on a particle that has a mass of 1.5 kg. the force is related to the position x of the particle by the formula fx = Cx^3, where C = 0.5 if x is in metersand Fx. is in Newtons. a.) What are the SI units of C? b.) Find the work done by this force on the particle when the...

A block of mass m1=3.6 kg is at rest on a plane that makes an angle of 30 degrees above the horizontal. The coefficient of kinetic friction between the block and the plane is 0.24. The block is attached to a second block of mass m2=5.4 kg that hangs freely by a string that passes over a...

Two blocks attached by a string slide down a 16° incline. Block 1 has mass m1 = 0.68 kg and block 2 has mass m2 = 0.24 kg. In addition, the kinetic coefficients of friction between the blocks and the incline are 0.30 for block 1 and 0.20 for block 2. What is the magnitude of the acceleration...

A plane flies at an airspeed of 252 km/h. A wind is blowing at a 79 km/h toward the direction 60 degrees east of north. a) in what direction should the plane head in order to fly due north realtive to the ground? b) What is the speed of the plane relative to the ground? i need help with this...

with the horizontal.? The roof of a two-story house makes an angle of 27 degrees with the horizontal. A BALL ROLLING DOWN THE ROOF ROLLS OFF THE EDGE AT A SPEED OF 4.4 m/s. THE DISTANCE TO THE GROUND FROM THAT POINT IS 7.4 m. a) how long is the ball in the air? b)How far from the base of the...